<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input v-model="name" type="text" />
    </div>
    <div>
      <span>年龄:</span>
      <input  v-model="age" type="number" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex" >
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addOrEditFn" >添加/修改</button>
    </div>
    <div>
      <table
        border="1"
        cellpadding="10"
        cellspacing="0"
      >
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
       <tr v-for="(obj, index) in dataArr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ obj.name }}</td>
          <td>{{ obj.age }}</td>
          <td>{{ obj.sex }}</td>
          <td>
            <button @click="del(index)">删除</button>
            <button @click="edit(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data(){
     return{
       name:'',
       age:'',
       sex:'',
       editIndex: null,
       dataArr: [
        {
          name: "Tom",
          age: 19,
          sex: "男",
        },
        {
          name: "Jone",
          age: 21,
          sex: "女",
        },
      ],
     }
  },
  methods:{
    addOrEditFn(){
      let newobj={
        name:this.name,
        age:this.age,
        sex:this.sex
        }
        if(this.editIndex!==null){
          this.$set(this.dataArr,this.editIndex,newobj)
          this.editIndex=null
        }
        else{
          this.dataArr.push(newobj)
          this.name=''
          this.age=''
          this.sex=''
        }
    },
    del(index){
      this.dataArr.splice(index,1)
    },
    edit(index){
      let editobj=this.dataArr[index]
      this.name=editobj.name
      this.age=editobj.age
      this.sex=editobj.sex
      this.editIndex = index;
    }


  }
  
}
</script>